Huawei LUNA2000-200KWH-2H1 User Manual page 163

LUNA2000-200KWH-2H1 Smart String ESS
User Manual
Alarm Alarm
ID Name
3814 Air
Conditio
ner AC
Undervo
ltage
3816 Air
Conditio
ner
Evapora
tor
Temper
ature
Sensor
Fault
3817 Air
Conditio
ner
Condens
er
Temper
ature
Sensor
Fault
Issue 03 (2023-03-30)
Alarm Possible Cause
Severit
y
Major Cause ID = 1–13
1. The power cable of
[HVAC-No] is loose.
2. The model of
auxiliary power
supply is incorrect.
3. The main control
board is faulty.
4. The undervoltage
alarm threshold is
incorrect.
Minor Cause ID = 1–13
1. The cable to the
evaporator
temperature sensor
on [HVAC-No] is
loose.
2. The sensor is
damaged, open-
circuited, or short-
circuited.
Minor Cause ID = 1–13
1. The cable of
[HVAC-No] is not
connected securely
or correctly.
2. The sensor is
damaged, open-
circuited, or short-
circuited.
Copyright © Huawei Digital Power Technologies Co., Ltd.
Suggestion
1. Check that the AC undervoltage alarm
threshold is set to a proper value. The
default value is 176 V.
2. If the preceding threshold is set
properly, measure the voltage of the
air conditioner wiring terminal. If the
voltage is approximately 110 V or 127
V, the model of the auxiliary power
supply is incorrect. In this case,
disconnect the auxiliary power supply
immediately and replace it with a 380
V power supply.
3. If the voltage is less than 150 V, check
whether the cable is loose.
4. If the voltage is approximately 220 V,
contact your technical support.
1. Shut down the system at a proper
time and take safety measures.
2. Check whether the cable is loose.
3. Replace the evaporator temperature
sensor.
1. Shut down the system at a proper
time and take safety measures.
2. Check whether the cable is loose.
3. Replace the condenser temperature
sensor.
13 Alarm Reference
154